package com.xz.POI;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.joda.time.DateTime;
import org.junit.Test;


import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class ExcelWriteTest {

    String PATH = "D:\\WorkSpace\\StudySpace\\POI-EasyExcel\\";

    @Test
    public void testWrite03() throws IOException { // 03版本的xls
        // 1、创建一个工作簿
        Workbook workbook = new HSSFWorkbook();
        // 2、创建一个工作表
        Sheet sheet = workbook.createSheet("统计表");
        // 3、创建一个行（1,1）
        Row row1 = sheet.createRow(0);// 第一行
        // 4、创建一个单元格
        Cell cell11 = row1.createCell(0);
        cell11.setCellValue("今日新增观众");
        // (1,2)
        Cell cell12 = row1.createCell(1);
        cell12.setCellValue(66);

        // 第二行
        Row row2 = sheet.createRow(1);
        Cell cell21 = row2.createCell(0);
        cell21.setCellValue("统计时间");
        // (2,2)
        Cell cell22 = row2.createCell(1);
        String time = new DateTime().toString("yyyy-MM-dd HH:mm:ss");
        cell22.setCellValue(time);

        // 生成一张表（IO流） 03 版本就是使用xls结尾！
        FileOutputStream fileOutputStream = new FileOutputStream(PATH + "观众统计表03.xls");
        // 输出
        workbook.write(fileOutputStream);
        // 关闭流
        fileOutputStream.close();

        System.out.println("观众统计表03.xls 生成完毕！！");
    }

    @Test
    public void testWrite07() throws IOException { // 07版本的xlsx
        // 1、创建一个工作簿
        Workbook workbook = new XSSFWorkbook();
        // 2、创建一个工作表
        Sheet sheet = workbook.createSheet("统计表");
        // 3、创建一个行（1,1）
        Row row1 = sheet.createRow(0);// 第一行
        // 4、创建一个单元格
        Cell cell11 = row1.createCell(0);
        cell11.setCellValue("今日新增观众");
        // (1,2)
        Cell cell12 = row1.createCell(1);
        cell12.setCellValue(66);

        // 第二行
        Row row2 = sheet.createRow(1);
        Cell cell21 = row2.createCell(0);
        cell21.setCellValue("统计时间");
        // (2,2)
        Cell cell22 = row2.createCell(1);
        String time = new DateTime().toString("yyyy-MM-dd HH:mm:ss");
        cell22.setCellValue(time);

        // 生成一张表（IO流） 03 版本就是使用xlsX结尾！
        FileOutputStream fileOutputStream = new FileOutputStream(PATH + "观众统计表07.xlsx");
        // 输出
        workbook.write(fileOutputStream);
        // 关闭流
        fileOutputStream.close();

        System.out.println("观众统计表07.xlsx 生成完毕！！");
    }

    @Test
    public void testWrite03BigData() throws IOException {
        // 时间
        long begin = System.currentTimeMillis();

        // 创建一个薄
        Workbook workbook = new HSSFWorkbook();
        // 创建表
        Sheet sheet = workbook.createSheet();
        // 写入数据
        for (int rowNum = 0; rowNum < 65536; rowNum++) {
            Row row = sheet.createRow(rowNum);
            for (int cellNum = 0; cellNum < 10; cellNum++) {
                Cell cell = row.createCell(cellNum);
                cell.setCellValue(cellNum);
            }
        }
        System.out.println("over!");
        FileOutputStream fileOutputStream = new FileOutputStream(PATH + "testWrite03BigData.xls");
        workbook.write(fileOutputStream);
        fileOutputStream.close();
        long end = System.currentTimeMillis();
        System.out.println("耗时：" + (double) (end - begin) / 1000);
    }

    @Test
    public void testWrite07BigData() throws IOException {
        // 时间
        long begin = System.currentTimeMillis();

        // 创建一个薄
        Workbook workbook = new XSSFWorkbook();
        // 创建表
        Sheet sheet = workbook.createSheet();
        // 写入数据
        for (int rowNum = 0; rowNum < 65537; rowNum++) {
            Row row = sheet.createRow(rowNum);
            for (int cellNum = 0; cellNum < 10; cellNum++) {
                Cell cell = row.createCell(cellNum);
                cell.setCellValue(cellNum);
            }
        }
        System.out.println("over!");
        FileOutputStream fileOutputStream = new FileOutputStream(PATH + "testWrite07BigData.xlsx");
        workbook.write(fileOutputStream);
        fileOutputStream.close();
        long end = System.currentTimeMillis();
        System.out.println("耗时：" + (double) (end - begin) / 1000);
    }

    @Test
    public void testWrite07BigDataS() throws IOException {
        // 时间
        long begin = System.currentTimeMillis();

        // 创建一个薄
        Workbook workbook = new SXSSFWorkbook();
        // 创建表
        Sheet sheet = workbook.createSheet();
        // 写入数据
        for (int rowNum = 0; rowNum < 65537; rowNum++) {
            Row row = sheet.createRow(rowNum);
            for (int cellNum = 0; cellNum < 10; cellNum++) {
                Cell cell = row.createCell(cellNum);
                cell.setCellValue(cellNum);
            }
        }
        System.out.println("over!");
        FileOutputStream fileOutputStream = new FileOutputStream(PATH + "testWrite07BigDataS.xlsx");
        workbook.write(fileOutputStream);
        fileOutputStream.close();
        // SXSSF会产生临时文件，清除临时文件！
        ((SXSSFWorkbook) workbook).dispose();
        long end = System.currentTimeMillis();
        System.out.println("耗时：" + (double) (end - begin) / 1000);
    }

}
